Parking meter



Nov. 4, 1941. o. c. JENSEN l 2,261,549

PARKING METER y Original Filed Deo. 19, 1936 2 Sheets-Sheet 1A INVENTO Uffa j Jwe ATTORNEYS Nov. 4, 1941.

o. QJENSEN PARKING METER Original Filed Deo. 19, 1956 2 Sheets-Sheet 2 A'ITORNEYS Patented Nov. 4, 1941 PARKING METER Otto C. Jensen, Detroit, Mich., assignor, by mesne assignments, to Mary W. Moody, Washington,

Continuation of application Serial No. 116,772, December 19, 1936. This application May 8, 194.1, Serial N0. 392,521

13 Claims.

My invention pertains to time measuring devices and more particularly to an improved method of and meansl for regulating the parking interval of parked vehicles.

The difficult problem of efliciently regulating the parking of vehicles on public streets in congested areas cannot be solved by enacting numerous restrictive ordinances because of the tendency of the drivers to ignore such ordinances. To detail suiiicient patrolmen to efficiently en force such ordinances by marking the tires and noting the parking times involves great expense and is often impractical because of the great numbery of men that would be required.

The ideal solution of this problem apparently resides in the provision of automatic means which may be operated by the car drivers whereby they may rent the available parking spaces from the city when they park their cars. Applicant is aware that previous attempts have been made to solve this problem by providing curb-installed parking meters for automatically indicating the parking time and collecting a parking fee. However, so far as applicant is aware, these devices have proven unsatisfactory in practice because they did not eliminate the necessity for close police supervision, and they failed to provide for sufcient flexibility of operation to accommodate the various parking fees for different parking periods. Also such prior art devices have been unreliable, and required close attention for maintenance and operation. Furthermore, aftera driver had overparked his car it was easy for him to drive off and ignore the parking meter.

It is accordingly an object of my invention to provide an improved parking meter which is reliable and positive in its operation and sufiiciently iiexible in its arrangement to readily accommodate various parking schedules, and which cannot be ignored by a driver yafter he has overparked.

parks the car over a predetermined time interval.

It is also an object of my invention to provide a parking meter, comprising a time measuring clock mechanism, a parking time indicator, a clutch for drivingly connecting the indicator with the clock mechanism, means for operating said clutch and means winding the clock mechanism each time the parking meter is put into use.

The novel. features that I consider characteristie of my invention are set forth with particularity in the appended claims. The -invention itself, however, both as to its organization and its method of operation, together with additional objects and advantages thereof, will best be understood from the following description of specic embodiments, when read in connection with the accompanying drawings, in which:

Fig. 1 is a front elevational view of an embodiment of my parking meter with a portion of the front wall thereof broken away to show the coordination of most of the movable parts therein;

Fig. 2 is a cross-sectional view taken substantially on the line 2-2 of Fig. l;

Fig. 3 is a horizontal sectional view taken substantially on the line 3-3 of Fig. 1;

Fig. 4 is an enlarged fragmentary section taken substantially on line 4-4 of Figs. 1 and 3.

Fig. 5 is an enlarged fragmentary section taken substarftially on line 5 5 of Fig. 3 and illustrating a personal-key controlled mechanism of the parking meter.

Fig. 6 is a section taken on line 6--6 of Fig. 5;

Fig. '7 is an enlarged fragmentary section taken y on line 'I-'l of Fig. 3; and

It is also an object of my invention v ltofprovide W a parking meter, comprising a time neasuring device, a parking time indicator, personal-key actuated means for drivingly connecting their:- dicator with the ,time measuring device, and meter-key controlled means for disconnecting the indicator from said time measuring device at the end of the desired parking period.

Another object vof my invention is to provide in such a parking meter coin-controlled means for collecting an initial :fee at the beginning of the parkire' period and additional coin-controlled the operating parts of the meter.

" my parking meter comprises a casing laf'which is preferably constructed of sheet metal and houses The casing l is of substantiallycylindrical shapey and has bevelled corners between the back wall and the side wall and a flared base 2 which is open at the bottom as shown in Figs. 1 and 2. For measuring the time of the parking period, I provide a time measuring device 3 (Figs. 2 and 3) which may be any one of a number of suitable clock mechanisms that are available on the market. The time measuring device 3 is mounted on the means for collecting another fee if the driver 55 front wall of the casing I by any suitable means arcuate piece of any suitable transparent material which is secured in an aperture 9, provided in a bevelled portion of the front wall of the casing 5. The transparent piece is secured in the casing i by means of a suitable frame II which is secured to said casingin any suitable manner.

In order drivingly to connect the indicator B with the time measuring device 3, a tubular shaft I3 (Figs. 1, 2 and 3) is iournalled in, and projects beyond, the rear wall of said time measuring device or clock mechanism 3 by whichv said shaft is directly driven in any suitable manner.

The` desired speed ratio between the time measuring device 3 and the indicator I is readily obtained by providing the concealed end of the tubular shaft i3 with a gear wheel which is in mesh with a gear (not shown) of suitable ratio of said time measuring device.

On the outwardly projecting end of the tubular shaft I3, I mount the driving member Il of a clutch. Journalled in the tubular shaft I I is a shaft i1 which extends through the clock mechanism l and has an end portion in form of a square shank I9 projecting through the front wall of the casing I. Mounted on the square A compression spring 41 is interposed between the bottom wall 4! of the guide sleeve II and the lock barrel 39, normally urging the latter into the inoperative position shown in Fig. 3. Extending through the bottom wall 49 of the guide sleeve Il is an elongationi of the lock barrel 39.

The lock barrel 39 is provided with gear teeth I3 which are in permanent mesh with the rack teeth 55a of a locking bar 55, the former thereby extending through a peripheral slot 61a in the guide sleeve 4I. The locking bar 55 is provided with axially alined slots 5i and il through which extend guide pins 51 and 89, respectively, which project from the front wall of the casing I and guide said bar 55 for linear movement. More particularly, pin 51 is provided with a head 38 and athreaded reduced portion BI which extends through said front wall and receives a nut B3. A spacer "a is disposed between the front wall of the casing I and the locking' bar il, whereby the latter is guided in spaced relation with said front ,4 wall. The ther guide pin is of similar construcshank I9 and abutting the' inner surface of the front wall of the casing I is a segment 2l. The other end of the shaft i1 is journalled in a plate 25'which is suitably secured to the rear wall of the casing i.

, Slidable on the, shaft Il is a driven clutch member 26 which cooperates with the previously described driving clutchmember I5 and has a hub 21. In order drivingly to connect the shaft Il with the driven clutch member 2i, yet permit axial movement of the latter relative to said shaft into and out of engagement with the driving clutch member I5, a cross pin 2,9 of the shaft I1 projects into diametrically opposite slots ll in the hub 21 of said driven clutch member 2l (Fig. 2). The indicator I is provided with a depending arm 33' (Figs. 2 and 3), having at its lower end a` collar $5 which ismounted on the shaft I1 in any suitable manner as by the pin l1, for instance.

For engaging the clutch members I5, Il in order to operate the indicator 5, I provide a keycontrolled member 39 which is in the form of a conventional lock barrel (Fig. 5) that is rotatable and axially movable in a guide sleeve II, mounted with its flange I3 on the inner surface of the front wail of the casing I in any suitable manner. A personal key 44 of the driver operates the lock barrel 39.

For controlling the movements of the key-actuated lock barrel 39, the guide sleeve Il is provided with a bayonet slot 46. A guide pin carried by the lock barrel 3S, projects into the bayonet slot 46 whereby axial motion of saidlock barrel is obtained when the pin rides in the longitudinal portion of said bayonet slot, and rotation of said lock barrel is obtained when said A pin rides in the lateral portion of said bayonet tion and mounting.

The lock barrel 3! is also provided on its lower portion with.another set of rack teeth 85 which are in permanent mesh with a gear i1, mounted on a allait Il as by a pin lia and projecting through a slot 1l in the guide sleeve'll. The rack` teeth Il extend Vtransversely to the rack teeth. and around a substantial portion of the circumference of the lock barrel l! so as to permit the latter to rotate Within limits donned by the lateral portion of the bayonet slide l without getting out of 'mesh with the gear l1. When the lock barrel Il is moved axially in the guide sleeve 1i, its rack teeth Il rotate the gear l1, while the latter is not rotated whensaid lock barrel is rotated.

The rotary motion imparted to the gear l1 on depression of the lock barrel I9 into the guide sleeve Il is utilised for winding the clock mechanism 3. To this end the shaft il which is Journalledinabearingn of abracket Il carries' a. Yfriction disk 'Ii (Fig, 1) which is yieldingly urged into driving engagement with' another friction disk 19 by a compression spring 11, in- ?skrposed" between the bearing 1I and said friction onawinding shaftll for theclockmechanism.

mwmdingsnmnrisioummedinsm' I5 on the clock mechanism 3. At its inner end the winding shaft II is connected with any suitable driving means, such as bevelled gears (not shown), for winding the clock mechanism in the manner'commonly found in watches, for example. With this arrangement. the depression of the 10er bei-rei n inw umiengitudinu position sh|; wnin1"ig.5causeswindingoftheclock mechanism I through intermediation of the friction clutch 1S, 1I which provides sufncdent slippage to prevent injury to the clock mechanism ifthe lockbarrel 3l should tendtooverrunsaid mechanism on initial depression after installation. Longitudinal movement of the lock barrel 'u in the reverse direction turns the winding shaft Il in the reverse direction, but has no effect on the clock mechanism I because of the customary provision of a Aone-way clutch (not shown) in the clock-winding drive. Hence, the clock mechanism 3 of the parking meter is automatically wound as thelock barrel Il is manipulated by the driver with his own key.

An elongated slot Il is provided in the locking bar Il through which the shaft I1 projects. permitting longitudinal movement of said bar with- The friction disk 'Il is mounted at Il out interference from said shaft. 'I'he locking bar 55 is also provided with a bayonet slot 93 (Fig. 1) which cooperates with a movable latch 95 in order to arrest the locking bar 55 in its left end position. The latch 95 is vertically slidable between horizontally spaced pairs of pins 91 which project from the front wall of the casing and carries a pin 99 which projects into the slot 93 in the locking bar 55. By means of a delicate spring (Fig. 4)` the latch 95 is urged upwardly so that its pin 99 enters the vertical portionfof the bayonet slot 93 as viewed in Fig. l when the locking bar 55 is moved into its left end position, thus arresting said bar 55 in its left end position. A coin slot |00 (Fig. 4) is provided in the front wall of the casing and spaced plates |03 project therefrom inwardly on opposite sidesof said coin slot to form a chute in which a coin |02 of a predetermined denomination may be deposited.

A finger |04, which projects from the upper edge of the locking bar 55, slants backwardly and upwardly and is so located on said locking bar that when the same is in its left end position, said finger |04 serves as a stop for the coin |02 in the chute |03. `The deposited coin |02 then rests on the movable latch 95 (Fig. 1) and its weight is suiiicient to depress saidA latch so that its pin 99 is moved downwardly in the vertical portion of the bayonet slot 93 of the locking bar 55 and into the horizontal portion of said slot. Thereafter, the locking bar 55 can be moved axially to the right as shown in Fig. whereby the coin retaining flnger |04 is carriedaway from the coin chute |03 and the coin |02 drops'into a coin receiving tube |01 which may be provided with downwardly extending fiexiblespring fingers |09 to prevent unauthorized extraction of coins therefrom. The coin slides through the hollow tube |01 and into a coin bin` which is separated from `the mechanical structure in the casing bya partition The lower portion of the coin bin may be closed in any desired manner or it may open into any stand or receptacle (not shown) on which the parking meter is mounted.

Having inserted the proper coin |02 into the slot |00 and thereby released the locking bar 55 in its left end position, the operator of the parked automobile first depx'esses the lock barrel 39 into the longitudinal position shown in Fig. 5 and then turns the same into the angular position shown in this figure by means of his personal key 44, thereby moving the bar 55 to its extreme right end position in which the end of a spring latch I0 (Fig. 7) jumps into a slot 2 in said bar 55 as shown in Fig. '7 and locks the latter in said right end position. The locked bar 55 in its right end lposition prevents removal of Vthe operators personal key from the lock barrel 39 as will be morefully explained hereinafter.

. The driving connection between the wound clock mechanism 3 and the indicator 5 is initiated on depression of the lock barrel 39 when its elongation 5| rocks a clutch-operating lever H3. The lever ||3 is pivotally mounted at ||5 and the bifurcated end 9 of its arm ||1 straddles an ansonally identified key from the meter.

nular groove in the hub 21 of the driven clutch element 26 (Figs. 2 and 3), while a compression spring |20 normally urges said lever |3 in counterclockwise direction as viewed in Fig. 3 and into the clutch-disengaging position shown therein. Hence, when the lock barrel 39 isY depressed, its elongation 5| rocks the clutch lever ||3 into clutch-engaging position against the compression of the spring |20, and said lever remains in 3 clutch-engaging position while the lock barrel 39 is retained in its depressed position by the bayonet slot 46 and locked in this position by the locked bar 55.'

The key-controlled lock barrel 39 is preferably of a conventional construction wherein the personal key 44 controls the position of the tumblers |23 (Fig. 5) in a well known manner. Such lock barrels are readily obtainable on the market and form no part of my invention, wherefore a more specific disclosure and description thereof is deemed unnecessary. It may be stated, however, that the insertion of the personal key 44 serves to retract the lock tumblers |23, whereupon the lock barrel is free to move axially and rotate in the guide sleeve 4|. When the key 44 is removed from the lock barrel 39, the tumblers |23 are forced outwardly and into suitable recesses (not shown) in theguide sleeve 4|, thereby preventing any movement of said lock barrel in its guide sleeve. After the personal key 44 has been inserted to retract the lock tumblers |23 and the lock barrel 39 has been depressed and rotated to hold it in the meter-operating position shown in Fig. 5, the personal key cannot then be removed therefrom as is usual with locks of this kind.

It is desirable to record or count the number of operations of the parking meter over a period of time. To this end, any well known counter |25 such as a Veeder counter, is mounted on the rear wall of the meter casing by any suitable means such as screws |21 (Fig. 3). The free end of the lock barrel extensionv 5| carries an arm |29 which is suitably connected with the actuating rod |3| of the counter.

It is also desirable, when' the operator of an automobile overstays a predetermined parking period, to provide for collecting a second parking fee before the operator canremove his per- To this end,. a latch |33 (Figs. 1 and 2) -is pivotally mounted at |31 in a slot |35 in the locking bar 55. A sensitive leaf spring |39, carried by the locking bar 55, depends into the slot |35 and engages the latch |33, tending to rotate the same in counterclockwise direction as viewed in Fig. 2. A projecting heel |4| of the latch |33 engages an unlatching member |43 which is suitably guided for vertical movement as viewed in Fig. 2. The upper end of the unlatching member |43 is provided with a lateral U-portion |45 which serves as a coin-receiving tab for operation by a coin of suitable weight. A sensitive leaf spring |41 (Fig. 2) engages the U-portion |45 of the latch member |43 and normally urges the latter up- .wardly and away from the heel |4| on'the latch The previously mentioned segment 2| (Fig. 1) serves to lock the bar 55 in its right end position after a predetermined parking period has lapsed.

This segment 2| is rotated together with the parking time indicator 5 by reason of their mounting on the common shaft l1, and is provided with a concentric slot |49 which is so spaced from the shaft |1 that it is in alinement with the pivoted latch 33 (Fig. 9) when the bar 55 is in Yits right end position (Fig. 1). The angular.

' disposition and length of the arcuate slot |49 is so selected that the same moves into registry with the latch |33 after the lapse of the parking period paid for by the first coin, whereupon the latch |33 is spring-urged into latching engagement with said slot |49 and the bar 55 cannot be returned to its left end position by the opercasing through which a coin of predetermined denomination` is deposited. For receiving the coins inserted therein, a chute |53 is provided on the casing in alinement with the coin'slot ii. A second coin-holding finger |53a (Fig. 1)

projects upwardly from the locking bar 55 and is so disposed that it is in alinement with the coin slot when said bar 55 is in its right end position (Fig. l). The coin retaining finger |53a is suitably inclined so that a coin deposited in the chute |53 is held therein and rests uponthe coin-receiving tab |45 of the unlatching member |43. The spring |41 (Fig. 2) is of such force that a coin of predetermined denomination depresses the unlatching member |43, thereby rocking the latch |33 in the locking bar 55 fromlatching en- .gagement with the slot |43 in the segment 2| and releasing said locking bar 55 i'or movement into its lei't end position.

The locking bar 55 is moved to its left end position by means of a second key-controlled lock barrel |55 (Figs. 1, 3 and '1) which is axially movable and rotatable in a guide sleeve |51, mounted with its ilange |58 on the iront wall of the casing The lock barrel |55 is provided with gear teeth |55' which are in permanent mesh with rack teeth |53 of the locking bar 55. The lock barrel |55 is preferably of conventional manufacture, and comprises the` conventional lock tumblers |55 which are spring-urged in the well known manner to prevent rotation of the lock barrel when the key is removed.

A stem I5| of the lock barrel |55 is free to move beyond the end of the guide sleeve |51 and forces ing meter is not in use, is removed from the parking meter by the operator of a parked automobile and carried on his person until he wants to remove his automobile and regain his personal key 44 which has been locked in the parking meter during the parking period.

The parking time indicator5 is now free to resume its normal or zero position.4 For restoring the indicator to its normal position, a counter weight |5| is carried on the lower end oi an arm |52 (Fig. 2) which depends from the hub 21 of the driven clutch member 25. Also a return spring of any suitable design may be utilized instead of thecounter weight |5|.

vA different embodiment oiV the present invention may be provided wherein the personal-key controlled lock barrel 35 and the meter-key controlled lock barrel |55 are located in close proximity to each other. To this end, the lock barrel |55 isalocated vertically above the lock barrel 39 as shown in Fig. 8. In this arrangement, the

lock barrel |55 is turned 180 degrees so that its gear teeth |55 project downwardly and are in permanent mesh with rack teeth |.1I which are provided at the top surface of the locking bar 55 and 'take the place of the rack teeth |53 (Figs.

l and '1). Furthermore, the spring latch is mounted with its upper end at |13 on the front wall of the casing and its lower end is adapted to latch with a slot |15 in the upper portion of the locking bar 55. d

The operation of my parking meter, therefore, requires the following operations: (1) Inserting a coin of predetermined denomination through the slot |00 (Fig. 4) to release the locking bar 55; (2) Inserting a personally identiiled key into the lock barrel 35 to unlock it for depression and i. rotation whereby depression of said lock barrel causes `winding of the clock mechanism 3 and establishes the driving connection between the latter and the parking time indicator 5, while rotation of said lock barrel causes bar 55g be the spring latch ||5 from latching engagement with the locking bar 55 after insertion of a suitable key |53 in said lock barrel and consequent retraction of the tumblers |55 and .upon depression of said lock barrel against the compression of a spring |54. Thereafter the operator may turn the lock barrel |55 by means of key' |53 and thereby move the lockingbar 55 from its right end position into. its left end position. Such movement ofA the locking bar 55 causes also rotation of the lock barrel 33 from the. vlocked angular position shown in Fig. 5 into released position `in which' the pin 45 is located in the longitudinal portion of the bayonet slot and the personal key 44, may be withdrawn by the operawr. 'Ihe key |53, which the operator usesi'cr regaining his personal key 44, is provided in eachV meter and designated the "meter key. When the lockretracting extension 5| thereof releases the lever ||3 from clutch-engaging pOdtion. vThe lever -||3 is then immediately spring-urged into the clutch-disengaging position shown in Pig. 3, with the result that the driving connection between moved into its right end position and become locked therein; (3) Removal of the meter key |53 from the parking meter by the operator of the parked automobile; (4) Returning to his automobile, the'operator reinserts the meter key 53 and depressesand turns the same to unlock bar 55 and turn the same to its left end position, thereby resetting the parking time indicator, releasing the personally identified key for removal by the operator, and locking the meter key in the parkingmeter; (5) If the operamr parks his automobile longer than a predetermined time, he must insert an additional coin of proper denomination into the slot.|5| before performing operation number 4. l

The present parking meter is preferably installed adjacent the curb, and the street is preferably provided with painted lines for designating the limits of the parking space for the parking meter. It is also preferable to mount the parkventlon herein shown and described, it will be the clock mechanism 3 and the parking time indicator 5 is interrupted. The meter key |53,

which is locked in its barrel I llwhile .the Wkunderstood that numerous details of the construction may be altered or omitted without departing fromA the spirit and scope of the invention as disclosed and claimed, and that I do not desire to limit the invention tothe exact ccmstrulctions herein set forth..

controlled member.

This application is a continuation of my application, Serial No. 116,772, filed December 19, 1936.

I claim:

1. A parking meter having in combination, a

time measuring clock mechanism, a parking time means also operated by depressing said member for controlling said coupling means to connect the parking time indicator to the clock mechanism, guide means for said member for guiding it in successive motions of reciprocation and rotation and comprising holding means for holding said member in shifted position.

2. A parking meter having in combination, a time measuring device, a parking time indicator, coupling means for driving said indicator from said device, a key actuated member for controlling said coupling means, means for rotatably journalling said member, a holding bar shifted by the rotatable movement of said member, a second key controlled member operatively associated with said holding bar for .restoring the same, time controlled latch means associated with said ban-latch receiving means actuated simultaneously with said indicator for receiving the latch means associated with the bar after a predetermined time, and coin controlled means for unlatchingr said time controlled latch means from interlocked relation with the latch receiving means whereby the indicator of the parking meter may be reset by operation of said second key 3. A parking meter'having in combination, a time measuring device, a parking time indicator,

- coupling means for driving said indicator from said device, a key actuated member for control: ling said coupling means, means for rotatably journalling said member, a holding bar shifted by the rotatable movement vof said member, means for slidably supporting said bar, a second key controlled member operatively associated with said holding bar for restoring the same,

,latch means connected with and niounted in a cutout portion of said bar, cooperative latch means comprising a segmented disk portion adjacent said bar and actuated simultaneously with said indicator, a slot in said cooperative latch means for receiving the rst mentioned latch means after a predetermined time, and coin controlled means for unlatching said latch means from interlocked relation whereby the indicator vof the parking meter may be reset by operation of said second key controlled member.

4. A parking' meter comprising, in combination, a timing mechanism; a signal, a device operable to connect said signal and mechanism; av

lock barrel movable from a normal position to an active position for operating said device; a personal key for moving said lock barrel means for locking said lock barrel in active position; and other means associated with the locking means and manually operable to release said I locking means and means acting on said lock barrel when unlocked to return the latter to normal position. y

5. The combination in a parking meter as set forth in claim 4, in which said other means comprises a movable lock barrel and a meter key for manipulating the same. 4

6. A parking meter comprising, in combination, a timing mechanism; a signal, a normally disengaged clutch for drivingly connecting said mechanism vand signal; a rst axially movable and rotatable lock barrel having peripheral gear teeth and being of the type wherein the key is locked within the barrel upon rotation of the same and operative to cause engagement of said clutch on being moved axially; means holding the lock barrel shifted axially on rotating the same by the movement of a personal key from a key-releasing position into a key-locking position; a second rotatable lock barrel of the same type as the first barrel'operable by a meter key and having peripheral gear teeth; and a rack in mesh with the teeth of both barrels so that rotation of either barrel from key-releasing position into key-locking position results in rotation of the other barrel from key-locking po'sition into key-releasing position, and vice versa.

7. The combination in a parking meter as set forth in claim 6, further comprising a latch which normally arrests said rack in the position in which said rst barrel is in its key-releasing position, said latch being depressible by the weight of a coin to release said rack.

8. A parking meter comprising, in combination, a timingmechanism; a signal; a normally disengaged clutch for drivingly connecting said mechanism and signal; an axially movable and .rotatable lockl barrel of the type wherein the key is locked within the barrel upon rotation of the same and having peripheral gear teeth and being adapted to cause engagement of said clutch on being axially moved; means holding the lock barrel in shifted position on rotating the same by a personal key from a key-releasing position into a key-locking position; a movable rack in mesh with said barrel teeth; latch means on said rack, latch receiving means actuating simultaneously with said signal for receiving the latch means on the rack to hold the barrel in key-locking position after a predetermined' time of operation of said signal, said latch being deL pressible bythe weight of a coin to release said rack. l

9. In a parking meter, operating means for rendering said meter operative and inoperative, comprising a pair' of spaced lock mechanisms each including a lock barrel mounted for rotation between its locking and unlocking positions, an operating key for each barrel, and means for causing rotation of either barrel in response to rotation of the other barrel, said barrels being arranged relatively so that when one is rotated from its locking to its unlocking position the other is rotated from its unlocking to its locking position to permit removal from and insertion in said other barrel of its key.

10. In a parking meter, operating means for rendering said meter operative and inoperative, means for locking said operating means, and coincontrolled means for unlocking said operating means, said operating means comprising a pair of spaced lock mechanisms each including a lock barrel mounted for rotation between itsv either barrel in response to rotation of the other barrel, said barrels being arranged relatively so that when one is rotated from -its locking to its unlocking position to render said meter operative the-other barrel is rotated from its unlocked to its locked position to permit removal from and insertion in the thus locked barrel of its key.

12. In a parking meter, operating means for` rendering .said meter operative and inoperative,

locking means controlled by said operating means to lock the latter when said operating means is actuated to render said meter operative and to unlock said operating means when the latter is actuated to render said meter inoperd,

ative, additional means for locking said operat' ing means, and coin controlled means for actuating said additional means to unlock said operating means, said operating means comprising 'a pair oi spaced lock mechanisms each including a lock barrel mounted for rotation between its locking and unlocking positions, an operatassists ing key for each barrel, and means for causing rotation of either barrel in response to rotation of the other barrel, said barrels being arranged relatively so that when one is rotated from its locking to its unlocking position to render said meter operative thev other barrel is rotated from its unlocked to its locked position to permit removal from and insertion in the thus locked barrel of its key.

13. In a parking meter, operating means for rendering said meter operative and inoperative, timing mechanism, means for locking said operating means including a pair of members one of which is mounted for movement into and out of locking relation to the other, means adapted to be-actuated by said operating means to connect said timing mechanism with said movable member to move the latter into said locking relation to the other member and disconnect said timing mechanism, and movable member, and coin controlled means for unlocking said operating means, said operating means comprising a pair of spaced lock mechanisms each including a lock barrel mounted ior rotation between its locking and unlocking positions, an operating key for each barrel, and means for causing rotation of either/barrel in response to rotation ot the other barrel, said barrels being arranged relatively so 'that when one is rotated from its locking to its unlocking position the other is rotated from its unlocking to its locking position to permit removal from and insertion in said other barrel 0I its key.

OI'IO C. JENSEN. 

